Ctrl+Brain

Ctrl+Brain

Ctrl+Brain by an independent developer lets you capture text, images, or screenshots with ⌃⇧2, process them on your Mac, and save them into a local second brain with optional Supermemory sync and MCP

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What is Ctrl+Brain?

Ctrl+Brain is a macOS utility that turns a single keyboard shortcut into a local second brain. It captures text, images, or screenshots with ⌃⇧2, processes them entirely on your Mac using Apple Vision OCR and a local AI model, then saves everything into an editable Markdown file. The tool is built for users who want to collect and remember information without opening a separate app or sending data to the cloud. Optional Supermemory sync and MCP support let local agents search, read, and append to your brain.

Application scenarios

  • Research and note-taking

    Capture quotes, screenshots, or images from any app and save them as searchable Markdown notes.

  • Visual documentation

    Use the global shortcut to grab screenshots of interfaces, diagrams, or code, which are then OCR'd and described by a local model.

  • Personal knowledge management

    Build a local "second brain" that grows with every capture, with optional sync to Supermemory for cross-device access.

  • AI-assisted analysis

    Let local MCP agents read and append to your Markdown brain, enabling automated summarization or search without leaving your Mac.

  • Privacy-sensitive work

    Process sensitive documents or images entirely on-device, with no data leaving your machine.

  • Quick capture while multitasking

    Press ⌃⇧2 from anywhere—no need to switch windows or open a new app—to save whatever is on screen.

Core Features

  • Global shortcut capture

    Press ⌃⇧2 from any app to capture the current text, image, or screenshot in front of you.

  • On-device understanding

    Apple Vision OCR extracts text from images, and a local Claude/Codex model describes them—everything stays on your Mac.

  • Editable Markdown brain

    All captures are appended to a single, editable Markdown file that you can read, search, and modify.

  • Local MCP agent support

    MCP agents can read, search, and append to your Markdown brain, enabling automated workflows entirely on your machine.

  • Optional Supermemory sync

    Sync your second brain to Supermemory only if you add an API key—no data is sent by default.

  • Accessibility API integration

    The shortcut reads selections via the Accessibility API, working globally in any macOS app.

  • Three-step workflow

    Select anything, press ⌃⇧2, and the tool captures, understands, and saves—all in one keystroke.

Target users

Ctrl+Brain is designed for macOS power users, researchers, writers, and knowledge workers who want to capture information quickly without breaking focus. It also suits privacy-conscious users who need on-device processing and developers who want to integrate local MCP agents with a personal knowledge base.

How to use Ctrl+Brain?

  1. Download the app from the official website or GitHub.
  2. Grant Accessibility API permissions so the global shortcut can read selections in any app.
  3. Press ⌃⇧2 anywhere on your Mac to capture text, images, or screenshots.
  4. The tool automatically OCRs images, describes them with a local model, and appends everything to your editable Markdown brain.
  5. Optionally add a Supermemory key to sync your brain, or let local MCP agents read and append to it.

Effect review

Ctrl+Brain delivers on its core promise: a single keystroke that captures, understands, and saves without interrupting your flow. The local-first approach is a strong differentiator for users who value privacy and offline reliability. While the tool is clearly functional and well-documented, the website does not include user testimonials or performance benchmarks, so real-world speed and accuracy depend on your Mac's hardware and the local AI model. For anyone tired of context-switching to note-taking apps, this utility offers a lean, focused alternative that stays out of your way.

Frequently Asked Questions

What is Ctrl+Brain?
Ctrl+Brain is a Mac tool that lets you capture text, images, or screenshots with ⌃⇧2, process them, and save them into a local second brain with optional Supermemory sync and MCP.
How do I capture content with Ctrl+Brain?
Press ⌃⇧2 (Control+Shift+2) to capture text, images, or screenshots from your screen.
What is Supermemory sync?
Supermemory sync is an optional feature that allows you to synchronize your captured content with a Supermemory service for cloud backup or cross-device access.
What does MCP stand for in Ctrl+Brain?
MCP likely stands for Model Context Protocol, enabling integration with AI models to process or analyze captured content.
Is Ctrl+Brain free?
The tool is developed by an independent developer, and pricing details may vary; check the official page for the latest information.
Can I use Ctrl+Brain on Windows or Linux?
No, Ctrl+Brain is specifically designed for macOS and requires a Mac to run.

Ctrl+Brain - AI Tool Detail

Ctrl+Brain by an independent developer lets you capture text, images, or screenshots with ⌃⇧2, process them on your Mac, and save them into a local second brain with optional Supermemory sync and MCP

Category：Personal Assistant

Visit Link：https://www.ctrlbrain.xyz/

Tags：text capture、local second brain、screenshot tool、AI memory sync、MCP integration